Portable power-driven crosscut-saw



'Y To all whomz' may concern: 4

Be it known that AXEL I-IoLMBERG,v a subject Vofthe Kingof yGrreat Britain, andA resi-V dent-of SouthrEcklin, via Terang in-the State of` Victoria .and Commonwealthjof Y Australia,` has invented a certain new and f useful f Portable Power-Driven l Crosscut-V `the following is a specica-f provision of the sawfmotor andj operatingV Vifnechanism on a portable'A framey provided with .rear adjustable" supporting legs Y to carry the weight of? the Vfranie and maintain the samesubstantially rigidduring the sa'wVv ing` operation, the wheels ofthe frame ,being "`k so` mounted that they "are adapted to be. y raised clear of; the ground when notV reshown inFig. 1.

, ing one manner of connecting the forward Saw, of which tion.

saw operated vby a. convenient source of ,power preferably'A by a ,motor mounted on Y [the frame with the portablesaw.

"A feature ofV this invention is the pro vision of means andthe arrangementof parts whereby thesaw-is maintained in a substantially horizontal plane during aver--v tical cut sawing operation and Y until the saw has completed the cut, this beingfau'to# matically accomplished by/said means. u 1

anotherY feature of this invention is ythe quired for transportationpurposes. A furtherfeature consists. inpivotmgkthe sawfbladeto a guide block to 'all'owl'pofkllins` ited freedom of movement'.

:Another feature is the provision' of meansv where/bythe saw may be shifted relatlvejt'o' the main bodyof the device ftomake a. hor-1-v zontal cut-as in'felling-tree'sv Other features and advantages 4'will lhereinafter appearu j v In the accompanyingjdrawings':

,. Figure l` is a side elevationofjthe' fronti Vportion ofthe device.-

Fig. 2 .isfja top plan vieww'of the parts Fig. 3 is a detail perspective Vview showportion to the rear portion of the frame. j.A

" lig. iis-a side elevationvof the rear part of :the device and is a continuationfofV the Partsshownin Fig. 1.

, Fig.A 5A isk a top plan yie'wv the shownin Figzfll and is'fa continuation ,olf

the partsfshownin Fig. 2.- y y 1v-As illustrated in; the drawings the;device ofthe present invention comprises a main j frame l havlngzat itsfforward `end 2 thasaw.

rhis invention relates to auportablewoodl and ,the Hftel' appear." l 1 the-frame 1: During '-transportation offfthe" machine, the arms `8V carryingfthe wheels are held fixed to the `frame ibyethe rearward leX- tendingbars -11` whichare'held againstmove- .i ff

f ing their-lower ends fixed toa particuv thel t jfraine. i' Thusg-whenjthe parts areyin this'V position-the machine maybe easily"balancedH 1" Von the' wheels 6 andy mayzbe" pushed `to'.r the :work to'loe 'done bynieansofrhandles lr-prof., "gfi'decl"at the rear end'sofgthe-barsi Y .l 2 :The'saw,bladehasmdto-itsffrea .end- A an armi4 .124: pivotallymountedloniapin f ;.A L

' 1175fi i 80.2A

ment relative vto the vframe by tie rodSflQ hav- Ill. "j

inVt fupstanding ears v-16 ion crosshea-d whi'ch i'sniounted togslide inthajframei and which is refoiprocat'edbyfafpiitinalnfl pivotedn the cross head att-19" and-'.engag thereto'fwhich' is connected to" othersuitable-drivingconnect' ley. 23 ,'Qnfthegdrive fshafilz 24 handopeiated saws. .The-framel comprises atFits1--forwalidend2apair of-spacedangle]- Y y' bar-$25,; and it -is'pogn thosebars 25-that the'` cross head" is slijdalolyy mounted; the 'latter-be-V ingyheldto the .frameybyfa clip 26ysecud 1, to thecross head andunderlyinggone .,ofthe f anale-barsfi VV#Thef'Saw):bladels A'held Helef vat'edy'during transportation'bythe; engage# i; "1 lmentiof'-= thefarin l4ztherefor `with-'the for l, vward fend fthe'cross head asy 211:2?.`

a During; A :.transportation, it jf has; fj

. AXELfHoLMBERG, o F SOUTH Ecxmmvm TEEANG" imm-5.1m A STRA'IA;

Spcicatiouvof ettes Patelitik `Y i Appiicaton fueavvocfberi, T1918. 'serial N6. 256,385. Y blade .3,2 and/"at itsrear endl amotoig, va driving connectionrbetweenfthe,sawiblade f motorI beingprovided as.will-here;V Y z Y `4i 1:5: 60 Located approxlmatelygin vline, withfthe f. `1 center of gravity of the entire l,devicegthere 5 jf; isprovide'd a painof wheels 6 eachniountedf i on ar stubzshaft 7: carriedby :arms i 8 pivoted been.YV j

stated, thejframe. has onelpo'int ,of support on the` groundsA namely; the,'wheels.fr'fautf i1 f. i r preparatory to,fa-fsavvingL operationfia changek is inade so that the Ydevice `will lhave both?V a front andpiear supp-ort. solaswt i beglgd and. to -Qbe firmly held tothe work For 'this y link V by a ment of the bars 11 after the tie rods l2 are released from their connection to the frame. Before this is done, however, av pair of rear legs 28, which are also pivoted Yin the pin V9, are swung down to engage the ground.

Serving as a brace 'for the legs i8 and holding them in operative position are a pair of toggles, one for each leg, and geachcomprising` a link 29 pivoted on the lower end of the legQS and a link 30 pivoted at 3Q:1v to the 'frame '1, the link29 being connected to the pin 3l. The links 29 and'3() are held in extended dead-center position by a vsuita link 30' with the channel portion or the lin-k 29 with which it contacts. y The Vlegs 28 are'connected by a 'cross tie 28a to VVfurther insurerigidity and cause the legs to assume corresponding positions on the ground.

Thestub shaft 7 y for each wheel and the arm 8 therefor are ffurther braced by a yoke comprising an outside member 32 and an insidelmemberv 33 rigidly conn'ected'at their upperrends andy secured to the stub shaft 7 and arm 8 at their lower ends; these yokes is guided in its up and down movement with the wheel by a guide 34 en- Aga'ging the insidev member 33 which is arcu-V f v ate for the purpose,rthe arc'ofthe member 33 being struck from the center of the pin 9 'on which the yyoke and the arms 8 rotate;

`The forward end of the frame issupported on the log'or other work in hand by apair of arms 35 having the forward ends 36 in engagement with the work. The arms 35 at the rear ends are fixed Vto a shaft- 37 rotatably mounted in a frame 38 extending' upwardly, and as shown, rearwardly from `the eXtreme -forward end of the trame i being rigidly 'fixed to the angle bars 25 of the frame. The arms 35, as stated, Vare rotatably mounted on the frame but their position relative to the frame yis adjusted' and controlled by automatically operated mechanism 'for the purpose or maintaining the saw blade 3 substantially horizontalv during' a sawing operation, as will presently be described. At thispoint it should be noted that yafter thek arms 35 are in engagement with the log-and the legs 28 adjusted to proper position, the v'fr-ame is iirmly supf ported-at the front-and 'rear and that then Y with comparative ease.

noted that the arms 35 are 'arranged'to einthe wheels "can be raised from the ground It should' also be bracethe saw kblade 3 thus serving to guide the saw blade while starting the cut through the log, henceinsuring a straight and proper cut.

(The forward part or Qthe deviceis supported onthe arms 35 by a cable 'or rope 39 ha'yi'ng foneend 'fixed tothe Vframe 1 lat '40 and passingY overa 'pulley '4l-carried by the arms 135 thence under va "pulley 142 --and `from theLIatterftoftherrear i of 'the device where it ble engagement 'ofthe end of the Each of` is wound Von a drum 43 carried by a shaft 44 mounted in the frame l. The drum contains a spring which counteracts substantially the entire downward force of the forward part of the frame against the arms 35 which force tends to cause the drum to rotate and pay-ott the cable. This downward'forcev ter-acting force of the spring and therefore, the drum will rotate lto pay-orf the cable unless prevented by some means. This means 'in the'present device comprises Va dog 45pivoted on a yoke 46 fixed to the Viframe and engaging teeth 47 on a wheel 48 iixedto the drum to rotate therewith.

@By permitting t-he drum 43 to rotate'and thus to 'payoff 'the cable, the distance between the arms 35 and the frame atfthe is, however, slightly greater than the counpoints of connection 'of the cable maybe in-y *Y creased, thus vpermitting the vforward part of the frame to lower, pivoting on the ends ot' the legs 28 at the rear oithe device. lVhen this payingoifV oi the cable is properly Ves' controlled the rear end vof the saw can'be maintained at a properlevel to insurethat the saw blade', which is. supported by the work, will be substantially horizontal duringi the entire cut.

To accomplish this'the dog 45 for controlg ling the drum and theteeth 47"on'the Ywheel V LS'sec'u'red' tothe drum. are made to Jform an escapeme'nt'uponthe operation of 'which the drumis permitted to move step-by-step,

the dog'45 having for this purpose yanother :dog 49 securedthereto. The escapement dog 45--49 is controlled by a 'lever50 engaging the same Vand pivoted jon the frame at 5l, the lever 50 having an upwardly extending arm 52 engaging a spring 53'whereby the lever 50 normally Vtends to hold the dog45 engaged with one of the'teeth 47 of the wheel 4S. Through a'link 54 a bell-crank 55 and a forrmrd extending rod'56, the escapement dog controlling lever 50 is connected with a controlling bell-"crank '58 pivote'd at 57 to the iframe's there being an adjustable connection 59 between an Vupstanding arm 60 of the bcll-crank 57 and the rod 56'. At its or-l ward end the bell-crank hasy pi'voted a yoke lstraddling the saw blade 3 and carrying a roller 62 engaging the upper edge 'of the saw blade, a spring 643 beingr provided*between` 4log progresses; The arrangement suoli that the operation of the bell-crank 57l ani escapement for the drum causes the forward end 2 to drop an .extent just equalto .the

increased depthoflthe cut in the log at each' reciprocatory .movement of the saw blade.` The arms 35 rest upon a support 65, in .the

Y Yform cfa crossbar mounted on arms 66 ex tending upwardly from theframe l, when the sawv is being transported to the work.

The frame l, as .has-beenstated, comprises a forward part 2 and rear part 4,- and these parts are joined at a hoop-like member/67 .to which parts 2 and l are riveted. The hoop-like member 67 further serves las a brace for the entire frame, the forward part 2 having ties 69 secured tothe frame 38 and to the hoop 67, and the rear-frame 4 having` ties 69L secured thereto at the rear. and Vtoy this'invention the hoop 67 is formed of two' relatively movable parts 67a and 67?', as. u shownin Fig. ,31 the parte` being held to#v gether by guides Z0V and Vbeing "fixed in adl Y jjusted position by'clamping screws 7l. f'Ihis s 90. rIhe vitman l8hasa ball andsocket connection'Y 2 to the cross head l9to permit this rotation without Arequiring vany adjust-` ment or change on the "connections 'betweent combination withY a two-part frame; a sawv blade carried bythe front part of said frame;amotorca1ried by theirear part of` therframe; means forconnecting said mo-* structure permits the forward part.' 2 and the rearward partY 4. to bejrotated at least the saw blade andV the pitman operating the same'.

Shaft 44.

The spring 463 in addition toholdingthe; bellv cranlrto'l the saw blade exerts a com-iy paratively slight Ydownward pressure on the engaging the side 'of -thegsaw blad ea`wind Aing 'drurm' Vexible connection fromsaid saw blade,v .holding-the latter to I claim as vmy invention:r Y l. In a portabley power-d`rivenfsaw, the

.the work..

Vtor to said saw blade,` 1co-mprising areciproeating block carriedV by the front' 'part .of

the frame and a pitmancarried by theV rear part, means whereby the front part fof the' frame and the rearlpart ofthe frame 'may be angularly adjusted relatively to one an-y Y other; Vmeans for 'securing the front and rear partsof the frame ,together in adjusted. position; and a swivel jointv connecting said reciprocating block 'and saidpitmanto permit said angular adjustment of vsaid front frame Awith 4relation tor theY rear frame.r

the frame {supporting legs @hinged tof Ithe a frame; supporting arms thereon ;4 ap'owerdriven? .cross vcut-saw blade.; lbar's* arranged gg topass4 on either; side fof the vsaw bladeto guide thesam'e and hinged tosaid support-"1i"y fingzarins; means for controlling-said" guide 'v I *said blade`;av winding, drum; trip mecha` The rods 12 for'connecting the bars l1 tothe frame .during transportation 'is pro-fvided .with a loop portion adapted yto be A Y slipped l.over .the protruding kportion of *the* 5. In a portable "power-drivenv cross -cut` Y 'saw, thecombination ofl a saw.bladefpilv} 'day of July 191s.; Wiessee' L 2,. In a yportable power-driven cross'cut65 I Saw the .combination .of a frame 'having ff guides therein; shiftablel supportingv wheels therefor; a' saws ,blade7 a power generator n and an operating mechanism all mounted on frame; togglelinks connecting the'supportinglegs. to the-frame; Vhandle vbars carried f by the frame.: and .connected t0 s the axles of the lsupporting wheels .to-shift the same; 75...?

guides mounted onf: the s frame ;V f and guide bars connected tothe wheel axles and riding i in saidguides to guide the shifting -move-l y `ment of the wheels lrelative tothe frames@ s i 3i :In a portable. .sawgthe combination@ bars comprising a drum," aratchet,'a1pawl and flexible connectingfmeans from the said guide -bars tothe drum'ga spring-contlrolled f 4 armi;` and a roller z carried by said lspringe, A .'co'ntrolled arm adaptedfto bear againsb-'Glfji' .top fof thel saw to, keep-l itat working pres'- .9 0` .-;1`g

4. In'aportabler-powerdriven crosscut j l saw, .the combination of a frame; asblock l mounted to :reciprocate in said frame; aisaw blade pivotedtcjfsaid block;,afspringcon` trolled. lever adapted.. to exert "pressureon -nism connecting said-lever with 'said windlng .drum vpsawl-ami-'ratchet release` mechas.4

extending aroundand from ysaid drum .and

wound by .therotatigon-of said drum.'.` if

otallysupportediat its-rear end;y and means. forcontrolling the angle-of the-saw during Y the sawing operation comprising guide-arms,

drum to saidf lguide armsfa pulley forfgui'd? 'y 'ping vsaid flexible connection, a ratchet;a... 'pawlffor Ysaid ratchet, Va spring-'controlled arm engaging saidpawl, a bellcranlrpivfY spring,l and a rod connecting thefirst-named bell crank 'a'ndthe .last-namedarm.

i signada@ 'M9/11001111116, il thlState offlicln 'i toria, COmIQIlWalth of Australia., this XLHoILMB-ERG;

y .f AgEDwARDs, n

l.ote'd ona bracketonsaid frame, a linlrfconneeting said bellV Crank with said vspring-controller arm', a spring, falbellicrank, an arm 'i jf s connecting the last-named `bell crank and -1-20 if Y 

